Gage-cock for use on steam-boilers.



S. J. MOUROMOFP.

GAGE COCK FOR USE ON STEAM BOILERS.

APPLIOATION FILED MAY 2, 1913.

Patented Aug. 4, 19M

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SERGE JNN. MOUROMOFF, OF ST. PETERSBURG, RUSSIA.

GAGE-COCK FOR USE ON STEAM-BOILERS.

Application filed May 2, 1913.

Specification of Letters Patent.

Patented A11 4, 1914.

Serial No. 764,988.

To all 'w/zomit may 0012001 12 Be it known that I, SERGE JNN. MOURO-now, engineer, subject of the Emperor of Russia, residing at No. 10Alekseevska'ia street, Lessnoi, St. Petersburg, in the Russian Empire,have invented new and useful Improvements in Gage-Cocks for Use onSteam-Boilers, of which the following is a specification.

In connection with steam boilers it is usual to provide two gage cocks,one of which is above the maximum water level, while the other is belowthe minimum water level.

Under normal conditions only steam should appear when opening the uppercock and when opening the lower, only water should flow. Since however,the steam condenses very rapidly and the superheated water when enteringinto space of atmospheric pressure partly evaporates, it is difficult totell by inspection whether it is water or steam which escapes. Such gagecocks furthermore only permit of observing the v water level in theboiler at the moment of opening the cock, although it is of greatimportance for the supervision of the boiler to know whether anyundesirable fluctuations of the water level are taking place during acertain interval of time.

According to my invention the gage cocks are so arranged that they showat a glance whether steam or water is at the height where the cocks arefitted, and it is also rendered possible to see whether the water levelin the boiler has been fluctuating beyond the fixed limits after theprevious observations. I or this purpose the gage cock housings areprovided with transparent receptacles in which floats are adapted tomove. If the water level has not risen or fallen beyond its normallimits, there will he steam in the upper receptacle and water in thelower, whereby the floats can be seen in both the receptacles. Shouldhowever, the 'ater have risen beyond the maximum or fallen beyond theminimum level, the float in the corresponding receptacle will not beseen.

ln the accompanying drawings my in vcntion is illustrated by way ofexample.

Figure 1 shows my improved gage cocks in side elevation and fitted to asteam boiler. Figs. 2 to 4 are three modifications of the arrestingdevice. Fig. 5 is a side elevation of a modified form of the device.

In the drawings A and A are the transparent receptacles whichcommunicate with the housings E and E and which contain the floats D andD. Perforated plates R and R are also arranged within the recep tacles,which plates are provided with weights O, O. A connection between thereceptacles and the boiler is established by means of the pipes B and Bwhich are arranged at the height of the minimum and of the maximum waterlevel respectively in the boiler. The weights O and 0 are made so thatthe weight 0 is only slightly heavier than its plate R, and weight 0only slightly heavier than plate R. Thus the float D can by its weighteasily depress the plate R while the float I) on account of itsbnoyancyis capable of lifting the plate R.

The device operates in the following manner: hen the water in the boilerrises beyond the maximum level H, for example as far as I, it closes theentrance for the steam into the pipe B, thus the steam contained in thereceptacle A condenses and water will enter through the pipe and riseinto the receptacle. The float D is thereby caused to ascend into thecasing E, it lifts the plate t which immediately closes again and thusentraps the float in the said casing. hen afterward the water level inthe boiler falls again, the casing E again fills up with steam, but thefloat D is prevented from going back into its initial position in thereceptacle A. The disappearance of the float from the receptacle provesthat the water in the boiler had risen to above the maximum gage level.hen on the other hand the water in the boiler falls to below the minimumgage level N, for example as far as T, the passage through the pipe Bbecomes free and the water from the receptacle A and casing E flows intothe boiler whereby the float D falls and displaces the plate K. On thewater in the boiler rising, the steam in the receptacle and easingcondenses and the space is filled up with water, while the float isarrested by plate R- and entrapped in the casing E. It can thus be seen,that the water in the boiler had been below the minimum level. In orderto replace the floats into their receptacles A and A, the taps P and Pmust be closed, the plugs G and G unscrewed and the covers M and Mdetached. After the floats have been replaced and the previouslydetached parts have been refitted, the taps P and P are opened again andmay be sealed or otherwise marked so that only authorized persons willhave access to same. This having been done, the taps K and K are openedfor a short time in orde' to make sure that the proper connection hasbeen reestablished between the receptacles A, A and the boiler and toreplace the air in receptacle A with steam.

Instead of the aforesaid device any of the modifications which are shownin Figs. 2 to 4 may be used.

The device as illustrated in Fig. 2 consists of a spiral-shaped surfaceF which may be provided in the casing E and below which chambers U arearranged. Along this spiral the float D can move downwardly with thefalling water level as indicated by the arrow. When the watersubsequently rises, the float rises also and is caught in one of thechambers U as shown in the figure at D A similar device is arranged inthe casing E, but there the chambers U are provided above the spiralsurface F instead of below, so that the float can freely move in anupward direction but will be arrested when going downward.

The devices shown in Figs. 8 and 4 illustrate very simple forms of thefloat arresters in which funnel-shaped or simply obliquely arrangedsurfaces V and V are arranged in staggered manner in the casings E, E.Their operation is substantially the same as that described withreference to Fig. 2. The receptacle A, A, may be made entirelytransparent or they may be provided with a transparent Window asindicated at S in Fig. 5.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is:

In water gage cooks for use on steam boilers and for indicating themaximum and minimum water levels in combination, two transparentreceptacles. connections between said receptacles and the boiler, afloat in each of said receptacles, one of Which floats is adapted torise when the water in the boiler rises above the n'iaximum level whereas the other float sinks down when the water in the boiler falls belowthe minimum level, and means for arresting the floats in their highestor lowest positions respectively, and preventing their return into thereceptacles even if the water level re-assumes its normal position.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

SERGE JNN. MOUROMOFF. lVitnesses H. A. LOVIAGUINF AUG. MIGHIS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

